🍬 Oral Health Tools

Diet and Tooth Decay Risk Calculator

Log your typical daily food and drink habits. Get your acid attack frequency, sugar exposure score, and cavity risk level - with specific dietary changes that actually move the needle.

Acid Attack Counter Sugar Score Decay Risk Level Dietary Changes
Diet and Tooth Decay Risk Calculator
Enter how many times per day you consume each item
Sugary & Starchy Foods

Count each separate eating occasion - not the total amount. Snacking 5 times is far worse than one large meal.

Sweets, chocolate, biscuits, cakeHigh sugar, low pH - maximum acid attack duration
High risk
0
Crisps, crackers, white bread, cereal barsFermentable carbs - stick to teeth and ferment slowly
High risk
0
Fresh fruit (eaten as a snack between meals)Natural sugars and acids - less harmful as part of a meal
Moderate
0
Dried fruit (raisins, dates, apricots)Concentrated sugar that sticks between teeth
High risk
0
Sugary & Acidic Drinks
Fizzy drinks (cola, lemonade, energy drinks)pH 2.5-3.5 - highly erosive and high sugar
High risk
0
Fruit juice, smoothies, squashpH 3.0-4.0 - acidic even when labelled "healthy"
High risk
0
Sports drinks, flavoured waterpH 3.0-4.5 - marketed as healthy but highly erosive
High risk
0
Tea or coffee with sugarSugar in drinks causes acid attacks with every sip
Moderate
0
Tea or coffee without sugarSlightly acidic but no sugar - low caries risk
Low risk
0
Alcohol (wine, cider, cocktails)Acidic and often sugary - wine pH 3.0-3.5
Moderate
0
Protective Habits

🍬 Diet Decay Risk Results

Acid Attacks / Day
-
Safe: max 4-5 per day
Decay Risk
-
Diet contribution
Daily Sugar Score
-
0-30+ scale
Acid Attack Frequency

Each sugar or acid exposure triggers a 20-minute acid attack. The mouth needs time to recover between exposures. More than 4-5 attacks per day means the mouth is in constant acid mode.

0Safe zone (4-5)1015+
Priority Dietary Changes
Disclaimer: This calculator estimates dietary caries risk based on acid attack frequency. Individual risk depends on fluoride use, saliva quality, oral hygiene, and genetics. Use this alongside our Caries Risk Assessment Tool for a complete picture.

Why frequency matters more than quantity

The relationship between sugar and tooth decay is widely misunderstood. It's not about how much sugar you eat - it's about how often your teeth are exposed to it. Each exposure triggers a 20-minute acid attack as oral bacteria ferment the sugar and produce lactic acid. The pH of the mouth drops below 5.5 - the critical threshold at which enamel begins to dissolve.

10 sweets eaten in one sitting: 1 acid attack lasting roughly 20-30 minutes. 10 sweets eaten one per hour throughout the day: 10 separate acid attacks totalling over 3 hours of acid exposure. Same sugar quantity, completely different risk profile. This is why "grazing" - constant snacking and sipping throughout the day - is so destructive to teeth.

The practical target is keeping sugar and acid exposures to 4-5 per day maximum (3 main meals plus 1-2 snack occasions), with water as the default drink between those occasions. Pair this with the Fluoride Dosage Calculator to ensure adequate fluoride protection, and our Oral Hygiene Score to address the brushing side of cavity prevention.

Frequently Asked Questions

They're better for teeth than regular sugary fizzy drinks, but not harmless. Sugar-free fizzy drinks are still highly acidic (pH 2.5-4.0) and cause dental erosion. The acid dissolves enamel even without sugar - it just doesn't trigger the bacterial acid attack. A sugar-free cola causes erosion but not decay. The safest drinks for teeth are water, plain milk, and unsweetened tea or coffee. If you drink fizzy drinks, use a straw (reduces contact with teeth), drink quickly rather than sipping, and wait 30 minutes before brushing.
Yes, and the evidence is solid. Cheese raises the pH in the mouth, stopping the acid attack from the preceding meal. It also provides casein phosphopeptides that promote remineralisation of enamel. Hard cheeses (cheddar, edam) are most effective. A small cube after a meal or sweet snack is a genuinely useful protective habit. Milk has a similar but weaker effect. This is why "cheese and crackers" is ironically dental-friendly - the crackers acidify, the cheese neutralises.

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